On 29/11/2020 16:37:07, Andy Burns wrote:
Fredxx wrote:

Dave Plowman wrote:

What sort of resistance would you expect with an 18v cordless drill
motor?

Is this stripped-down and measuring just the windings?

I'm guessing but something in the region of 6ohmm -50/+100%

That'd only be 1.5 to 6A, so 27 to 108W, you can see 18V cordless drills
specced as taking 30A so over 500W, some who have re-purposed drill
motors for use in robots claim nearer 900W

What is more important is that the resistance is independant of
position, subject to the segment to segment change under the
commutator. Assuming brushed of course.

Yes, my estimate is rather low.

This replacement motor has a surprising spec:
http://www.robotcombat.com/products/BP393111-01.html

Perhaps the battery and motor control help to limit stall current rather
than just rotor resistance?